Thread: Input from file no white space characters

I'm reading data in from a file and putting it into a string then appending it to another file. The problem with this is that all the data is put onto one line with no whitespace characters put into outputted file. I assume this is due to the string. Is there any way to be able to output whitespace characters?

Here is part of the code:

Code:

CInput.open(FileName.c_str(), ios::in);
		
while (!CInput.eof())	//Read until end of file
{
	CInput >> FileLine;
	FileData.append(FileLine);
}

Thanks,

...Dan

I'm going to guess what you're asking since I didn't find your explaination too clear.

You want to read in the file, and you want to append to a string exactly, including the whitespace that is consumed by the istream::operator>>(). This is quite simple, unfortunately, using the operator>>, you give yourself a problem. That operator will stop on ANY whitespace. Which means you'd never know exactly what it's stopping on unless ofcourse you used istream::peek(). Better yet, you should probably read in a whole line with the getline() function. This way you can declare a delimeter to stop on, and append it after each encounter.

Code:

CInput.open(FileName.c_str(), ios::in);
		
while (!CInput)	// Better not to use eof()
{
	getline(CInput, FileLine, '\n');
	FileData += FileLine + '\n';  // The line plus the consumed delimeter
}

> while (!CInput) // Better not to use eof()
Isn't actually any better either.

Code:

while (getline(CInput, FileLine, '\n'))
{
	FileData += FileLine + '\n';  // The line plus the consumed delimeter
}

Originally Posted by Salem

> while (!CInput) // Better not to use eof()
Isn't actually any better either.

I agree with you. Had it been an iostream function, I would have controlled the loop with it, but the truth is I wasn't sure of the return on the std::getline() function. So I figured better safe the sorry.